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                  <a href="#glib-GUuid.description" class="shortcut">Description</a></span>
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<a name="glib-GUuid"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle"><a name="glib-GUuid.top_of_page"></a>GUuid</span></h2>
<p>GUuid — a universally unique identifier</p>
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<div class="refsect1">
<a name="glib-GUuid.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
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<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="glib-GUuid.html#g-uuid-string-is-valid" title="g_uuid_string_is_valid ()">g_uuid_string_is_valid</a> <span class="c_punctuation">()</span>
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<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-GUuid.html#g-uuid-string-random" title="g_uuid_string_random ()">g_uuid_string_random</a> <span class="c_punctuation">()</span>
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<div class="refsect1">
<a name="glib-GUuid.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;glib.h&gt;
#include &lt;glib/gi18n.h&gt;
</pre>
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<div class="refsect1">
<a name="glib-GUuid.description"></a><h2>Description</h2>
<p>A UUID, or Universally unique identifier, is intended to uniquely
identify information in a distributed environment. For the
definition of UUID, see <a class="ulink" href="https://tools.ietf.org/html/rfc4122.html" target="_top">RFC 4122</a>.</p>
<p>The creation of UUIDs does not require a centralized authority.</p>
<p>UUIDs are of relatively small size (128 bits, or 16 bytes). The
common string representation (ex:
1d6c0810-2bd6-45f3-9890-0268422a6f14) needs 37 bytes.</p>
<p>The UUID specification defines 5 versions, and calling
<a class="link" href="glib-GUuid.html#g-uuid-string-random" title="g_uuid_string_random ()"><code class="function">g_uuid_string_random()</code></a> will generate a unique (or rather random)
UUID of the most common version, version 4.</p>
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<div class="refsect1">
<a name="glib-GUuid.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="g-uuid-string-is-valid"></a><h3>g_uuid_string_is_valid ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>
g_uuid_string_is_valid (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *str</code></em>);</pre>
<p>Parses the string <em class="parameter"><code>str</code></em>
 and verify if it is a UUID.</p>
<p>The function accepts the following syntax:</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>simple forms (e.g. <code class="literal">f81d4fae-7dec-11d0-a765-00a0c91e6bf6</code>)</p></li></ul></div>
<p>Note that hyphens are required within the UUID string itself,
as per the aforementioned RFC.</p>
<div class="refsect3">
<a name="g-uuid-string-is-valid.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
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<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
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<td class="parameter_name"><p>str</p></td>
<td class="parameter_description"><p>a string representing a UUID</p></td>
<td class="parameter_annotations"> </td>
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</table></div>
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<div class="refsect3">
<a name="g-uuid-string-is-valid.returns"></a><h4>Returns</h4>
<p> <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if <em class="parameter"><code>str</code></em>
is a valid UUID, <a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a> otherwise.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-52.html#api-index-2.52">2.52</a></p>
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<hr>
<div class="refsect2">
<a name="g-uuid-string-random"></a><h3>g_uuid_string_random ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_uuid_string_random (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Generates a random UUID (RFC 4122 version 4) as a string.</p>
<div class="refsect3">
<a name="g-uuid-string-random.returns"></a><h4>Returns</h4>
<p>A string that should be freed with <a class="link" href="glib-Memory-Allocation.html#g-free" title="g_free ()"><code class="function">g_free()</code></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-52.html#api-index-2.52">2.52</a></p>
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<div class="refsect1">
<a name="glib-GUuid.other_details"></a><h2>Types and Values</h2>
</div>
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